Flash messages not preserved after redirection

[lewweiming]

## form_endpoint.php

$flash = $session->getFlash();
$flash->set('data', [
'test' => true
]);

header('Location: ' . $_SERVER['HTTP_REFERER']);

The flash data is empty after redirection. Did I miss out something?

[odan]

To commit the session use the save method:

// ...
$flash = $session->getFlash();
$flash->set('data', [
'test' => true
]);

$session->save();

header('Location: ' . $_SERVER['HTTP_REFERER']);